2 adjectives to describe picaroons

The circumstances attending this important success are as follows: Understanding that the celebrated picaroon had been on the Neapolitan and Roman coasts, doing much mischief, I took his Majesty's ship close in, following up the peninsula, with the land in sight, until we got through the Canal of Elba, early on the morning of the 21st.

But I never believed in them as devoutly as I believed in the destruction of that infernal picaroon.

2 adjectives to describe  picaroons